ORIGINAL: Silvanskii
From the cowlings I would say that was the post WWII variant called the Super DC-3.
Just a hunch.
Check out -
http://www.boeing.com/history/mdc/graphics/hist083b.htm
"The Super DC-3 was a major modification of the DC-3 with new wings and empennage, redesigned landing gear, lengthened fuselage and more powerful engines. As a replacement for the DC-3, it had considerable appeal to the military, and a few were converted to airline use."
Navy operated it as the R4D-8 - looks like the tail was grafted from the DC7. The wings look like they were redesigned, and were 5 ft shorter (95 vs 90) than the DC3/C47
Overall, when it was developed in the early '50s, the Super DC3 was a big improvement over the twenty-plus year old DC3 ..
Cruise speed went from 127 to 175 kt , range from 980 to 2100+ nm, useful load from 7900 to 10975 lb...
Best,
Jim